Assuming all of the above uncertainties are independent, the total
systematic uncertainties in the \(e^+e^-\rightarrow \pi ^{0}\pi ^{0}h_{c}\)  cross section
measurements are determined to be between 10% and 13%. The uncertainty in \({\cal B}(h_c\rightarrow \gamma \eta _c)\) , not listed in Table REF  but common to all CME
points, is 15.7% [1]} and is quoted separately in the cross section measurement.
<TABLE>